Guidance

Self Assessment technical specifications (2020) for individual returns

Use this technical documentation for individual returns if you're a software developer working with the Self Assessment online service.

From:
HM Revenue & Customs
Published
19 December 2019
Last updated
14 January 2021 — See all updates

Documents

Special cases version 1.1 (5 June 2020)

PDF, 209 KB, 7 pages

This file may not be suitable for users of assistive technology.

Request an accessible format.
If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email [email protected]. Please tell us what format you need. It will help us if you say what assistive technology you use.

Exclusion cases version 5.0 (6 January 2021)

ODT, 67.5 KB

This file is in an OpenDocument format

Self Assessment Individual RIM artefacts version 2.0 (2 December 2019)

ZIP, 3.89 MB

This file may not be suitable for users of assistive technology.

Request an accessible format.
If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email [email protected]. Please tell us what format you need. It will help us if you say what assistive technology you use.

Tax and National Insurance contributions calculation version E-1.6.0 (2 December 2019)

ZIP, 191 KB

This file may not be suitable for users of assistive technology.

Request an accessible format.
If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email [email protected]. Please tell us what format you need. It will help us if you say what assistive technology you use.

Stage 13 (Payments on Account) Tax and National Insurance contributions calculation version 1.0 (10 June 2019)

ZIP, 14.9 KB

This file may not be suitable for users of assistive technology.

Request an accessible format.
If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email [email protected]. Please tell us what format you need. It will help us if you say what assistive technology you use.

Test case generator version E-1.6.0 (4 December 2019)

ZIP, 3.11 MB

This file may not be suitable for users of assistive technology.

Request an accessible format.
If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email [email protected]. Please tell us what format you need. It will help us if you say what assistive technology you use.

MTR mapping document version 2.0 (3 December 2019)

ZIP, 22.6 KB

This file may not be suitable for users of assistive technology.

Request an accessible format.
If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email [email protected]. Please tell us what format you need. It will help us if you say what assistive technology you use.

Details

Individual returns technical specifications for software developers working with the Self Assessment online service.

Updates to this page

Published 19 December 2019
Last updated 14 January 2021 + show all updates

  1. The exclusion cases version 4.0 (22 October 2020) has been replaced with the exclusions version 5.0 document (6 January 2021).

  2. Exclusion cases version 4.0 (22 October 2020) has been added.

  3. Exclusion cases version 3.0 (2 July 2020) has been added.

  4. Specials v1.1 and Exclusions v2.0 PDFs (5 June 2020) have been added.

  5. Specials and Exclusions documents version 1.0 (31 March 2020) have been added.

  6. Specials and exclusions documents version 0.1 (25 February 2020) have been added.

  7. First published.

Sign up for emails or print this page